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E. M. HAMILTON. TYPE WRITING MACHINE.

No. 444,491. Patented Jan. 13,1891.

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E. M. HAMILTON.

TYPE WRITING MACHINE, No. 444,491; Patented Jan". 13, 1891;

UNITED STATES PATENT CEEICE.

EMERY M. HAMILTON, OF NENV YORK, N. Y., ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE NORTH AMERICAN MACHINE COMPANY, OF VEST VIR- GINIA.

TYPE-WRITI NG MACHIN E.

SPECIFICATION forming part of Letters Patent No. 444,491, dated January 13, 1891.

Application filed February 25, 1890- Serial No. 341,688. (No model.)

To aZZ whom, it may concern: rim or upper edge of the flange c of disk C.

Be it known that I, EMERY M. HAMILTON, The rocking of the arms Z) acts to vibrate the of the city, county, and State of New York, a bars a on their fulcru ms and to slide them citizen of the United States, have invented thereon back and forth endwise, so as to certain new and useful Improvements in carry the printing-type to and from thecom- Type-Vriting Machines, of which the followmon printing-point of the type-bar series. ing is a full, clear, and exact description,ref- The said rocking motion is given to said arms erence being had to the accompanying draw- I) by means of levers If, on which are formed ings, forming part of this specification. toothed segments biwhich mesh, respectively,

10 My invention relates generally to that class withthe pinions Z) on the arms. The levers of type-writing machines in which the type b are actuated by means of key-levers b proare carried by vibratory type-bars and are vided with keys I), and the rods b intermeadapted to print at a common printing-point, diate the levers b and I). By depressing a and in which the paper-carriage is moved key 19 its lever 11 operates to throw a rod b" [5 over the face of the type at theprinting-point upward, and said rodimpinging upon a lever with a step-by-step movement; and my inb vibrates said lever upward, and thereby vention relates more particularly to certain communicates the described movement to the improvements upon the type-Writing machine type-bar. This is clearly illustrated in Fig. invented by me for which Letters PatentNo. 2. Upon the release of the key b aspring C :0 357,670 were granted February 15, 1887. operates to retract the lever 19 and bring it My invention consists in the devices and downwardto its original position.

their combinations hereinafter set forth, and l) is the base-plate of the machine, which more at length recited in the claims. supports a disk or plate D which in turn Figure l is a plan of a type-writing masupports the disk or annulus C, as hereinaf- 2 5 chine containing my invention. Fig. 2 is a ter set forth. The key-levers may be ful-,

vertical central section of the same. Fig. 3 crumed, as shown at N, Fig. 2, on the base D, is a view in detail, partly in sect-ion, of parts and may play between the said base and the of the machine to which my present improvedisk or plate D the rods 1) preferably havments particularly relate. Fig. 4 is an obing bearings in said base and plate, as shown.

30 verse plan of my improved type-barsupport- D is a post set perpendicularly in the base ing disk or annulus, and Fig. 5 is a reverse at the center of the type-bar series or system. 83 plan of the same. Fig. 6 is a perspective Upon this post a sleeve D is adapted to have view of the C-spring, hereinafter described. play longitudinally, and said sleeve is pro- In the drawings, the type-bars are illusvided with the annular flange d, as shown.

3 5 trated at a arranged radially in a circular se- The inner ends Z1 of the levers b of the series, with their outer ends pivoted to a correries thereof engage the flange d, whereby 85 sponding series of rocking arms I), which the upward vibration of the outer ends of said arms have formed on them, respectively, seglevers b operates to depress the sleeve D on mental pinions 1;,journaled in the disk or said post D o .annulus C, the said bars being fulcrumed in- D is what is generally known as the unitermediate their ends on an annular ribc on versal lever of the machine, by means of .said disk 0. The said bars a pass through which the desired movement of the papervertical slots 0 0 formed, respectively, in carriage is attained. Said lever D" is fulnpwardly-projecting annular flanges c and crumed at (1 and one arm d thereof extends 45 c on the upper or obverse face of the disk C, toand engages thesleeve D", while its otherarm and have play therein over and upon their d extends to and engages thelever e, Which lefulcrums and between said fulcrums and a ver 6 serves to engage anddisengage the dog 6 corresponding annular rib cl, which depends to and from rack e on the paper-carriage E. from an annulus D, that is supported on the When the sleeve D is depressed by the end b of one ofthe levers Z) in the act of printing by a corresponding type-bar a of the series, the lever D is thereby vibrated, so that its arm (I operates to swing the lever (2, so as to shift the dog e from one tooth to another of the rack 6 thereby effecting the feed or movement of the paper-carriage. 'lhe carriage traverses the ways 6 and carries the usual cylindrical platen e and its pressure-roller 2".

My present invention relates primarily to the disk (2 and the combination therewith ot' the described type-bars (l and their act uatinglevers 0 In the patent hereinbefore referred tonamely, No. 2357,670-the levers h, which correspond to the levers b, are shown and described as fulcrumed upon an upwardly-projecting flange on an annulus which is separate from the disk onwhich the type-bars are fulcru med, and which is independently seated on the disk or plate 13, corresponding to the plate D while the rocking arms and their segmental pinions are journaled in another and separate annulus, which is supported above the plate B, and upon which annulus the type-bar disk is mounted; but the objection to and disadvantages of such an arrangement of the said parts are obvious. In the first place the multiplicity of separate devices makes the machine expensive and complicated in construction. Furthermore, it being necessary that the several annular disks on which, respectively, the rocking-arm pinions are journaled, the type-bars and levers are fulcrumed, should be arranged and adjusted concentrically with great exactitude in the machine, in order that the said movable parts shall have the proper and accurate motions in the operation of the machine. The assembling of the several disks and the parts mounted thereon is an exceedingly difficnlt and laborious work, necessitating me chanical skill of a high order.

The object of my present invention is to so simplify the structure of the machine that its. parts may be readily and quickly assembled with the required accuracy. To this end the disk 0, upon the upper side of which the type-bars a are fulci'uined and have play, as described, is provided with the depending annular flange c on its under side, the said flange being furnished with the edge or projections 0 preferably inwardly turned, while the inner ends h of the levers b are formed with the hook ends Z) preferably upwardly and outwardly turned, and thus adapted to engage said edge e of the flange 0 as shown in Figs. 2 and It is also preferable that the flange 0 should be of such a depth as to adapt it to serve as a support or standard for the disk C 011 the plate D by the rim of said flange resting upon said plate, as shown, in which case the flange 0 will have the vertical slots from its lower edge inwardly, and the-projections 0" will be formed on the flange at the bottom of each slot. The rim of the disk (1 is desirably provided with radial slots 0 in which the pinions I) of the rocking arms I) may be journaled,and in which the said arms and segments 71 may have play, as shown. It. will be found advantageous to cast or form the disk (I with its annular rib c and slotted annular flanges c c on its obverse face, the radial slots 0 at its rim, and the depending slotted annular supporting-flange c" having the projections e on its reverse face integral in one piece. by means of this described disk 0 it is evident that the said annular r b and flanges may be initially constituted in an exact concentric arrangement relatively to each other, and that the type-bars and their rocking arms and the lovers U" may be readily and accurately assembled on the disk, which, with these said parts mounted upon it, is then ready to be seated upon the plate D in the machine. In seating the disk Con the plate D an aperture- (1", central in the disk, may fit upon and be fixed to the post D, while the edge of the flange c" rests upon the face of said plate D A further feature of my present invention consists in the combination, with the described levers b and their supporting-disk, of the C-spring O. ()ne extremity of this C spring engages the upper edge of a lever I which may be effected by bifurcating the sa d spring end, asat c so that the lever edge is embraced by the bifurcation and yet the movement of the spring end over the lever edge when the spring is flexed and again relaited is permitted. The other end of the C-spr ng engages the under side of the disk (1, which may be effected by a hook c on the said end of the spring adapted to catch against the bottom of a radial rim-slot c in the disk, as shown. The disk is preferably annularly recessed at a on its under face, as shown, to permit the play of the C-springs when they are flexed. The advantages of these C- springs in connection with the described disk 0 in the rapid, accurate, and economical assemblin g of the various parts are apparent.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. In a type-writing machine, thecoinbination, with the levers b intermediate the keylevers and type-bars and provided, respectively, at their inner ends with hooks b, of a disk 0, upon which the type-bars are supported and fulcrumed, having on its under face a depending annular flange 0", provided with the edge or projections 0, whereby said levers are fulcrumed on said disk, substantially as and for the purpose set forth.

2. In a type-writing machine, the combination, with the levers 6 intermediate the keylevers and type-bars and provided, respectively, at their inner ends with hooks I), of a disk (J, having on its under face a depending annular flange c adapted in depth to serve as a support or standard for said disk and having the vertical slots 0" and the projections 0 at the bottom of said slots, respectively, whereby said levers are fulcrumcd on said disk-flange and have play in said vertical slots, substantially as and for the purpose set forth.

3. In a type-writing machine, the combination, with the type-bars a and the levers 11 provided on their inner ends, respectively, with upwardly and outwardly turned hooks b, of the disk 0, having on its obverse face the annular rib c, on which the type-bars are fulorumed and have play and on its reverse face the depending annular flange 0 provided with the inwardly-turned edge or projections c, on which said levers are fulcrnmed at' their said hooked inner ends, substantially as and for the purpose set forth.

4. In a type-writing machine, the combination, with the type-bars a and their rocking arms 12 and pinions b, and the levers b hav ing toothed segments 1)? on their outer ends and provided at their inner ends with the hooks b", of the disk 0, on the obverse face of which the type-bars are fulcrumed and have play, provided at its rim with the radial slots 0 in which said rocking-arm pinions are j ournaled, and on its reverse face with the annular depending flange 0 having the edge or proj ections 0 on which said levers are fulcrumed at their said hooked inner ends, substantially as and for the purpose set forth.

5. In a type-writing machine, the combination, with the type-bars a and the levers b provided at their inner ends with hooks 11 of the disk 0, having on its obverse face the annular type-bar fulcrum-rib c and the upwardly-projected vertically-slotted annular flanges and c, in which the type-bars have play on their said fulcrum-rib, and having on its reverse face the depending annular flange 0 provided with the edge or projections 0 on which said levers are fulcrumed by their said hooked inner ends, substantially as and for the purpose set forth.

6. In a type-writing machine of the class described, the single-lever system supporting disk 0, having on its obverse face the upwardly-projecting vertically-slotted flanges c and 0 together with the annular rib c intermediate said flanges, on its obverse face the depending annular flange 0 adapted to serve as a support or standard for said disk and provided with the vertical slot 0 and the edge or projections c at the bottom of said slots, and on its rim the radial slots 0 said disk, with its flanges and projections and slotted, as described, being formed integral in one piece, substantially as and for the purpose set forth.

7. In a type-writing machine, the combination, with the levers b provided at their inner ends with the hooks b, and the disk 0, provided on its lower face with the depending annular flange 0 having edge or projections 0 on which said levers are fulcrumed by their said hooked inner ends, of the C- springs 0, having respectively the bifurcated ends 0 engaging the said levers and their other ends seated on or against said disk, substantially as and for the purpose set forth.

8. In a type-writing machine, the combination, with the levers b provided at their inner ends with the hooks b and the disk 0, provided on its lower face with the depending annular flange 0 having the edge or projections c, on which said levers are fulcru med by their said hooked inner ends, and provided on said lower face with the annular recess 0 beyond said depending flange, of the C- Springs 0', having respectively the bifurcated ends 0 engaging said levers and their other ends seated on or against said disk and playing when flexed by the movement of said levers in said annular recess in said disk, substantially as and for the purpose set forth.

EMERY M. HAMILTON.

Witnesses:

E. 0. 00mm, E. M. DAWSON. 

